I've heard scenes like this referred to as "talking heads" (or something to that effect) when the entirety of the scene is just two people having a discussion (as seems to happen a lot in my own writing from feedback I get). In such cases, either the dialogue itself needs to be so important or engaging that your attention is focused on it so you don't miss anything, or there needs to be something else stimulating going on, essentially tricking the brain into paying attention to the dialogue with something more visually stimulating (without relevant auditory distractions) that keep your attention on the scene as a whole still, and this is largely the latter.

Yes, it's all text so "auditory" is not quite as relevant, but it still more or less augments the largely static nature of the dialogue by showing what's going on around the pair as they talk; if their walk and talk isn't visually interesting, their environment still can be. Also can be a convenient way of incorporating cameos without disrupting pace and flow of a story.

Oh yeah, I've heard it called that too. It's especially a concern in webcomics because there's a huge patch of comics that ended up being just talking heads and often copy-pasted across multiple panels so people tend to snipe away at it a bit quicker than in other mediums.

Thanked you on Tumblr, and I'll thank you here as well. Thank you so much for the cameo. It means a lot. Also, nice work giving Wind her bathing suit from her selfie picture!

De nada! Glad for the opportunity to include her

Good job lotsa cute girls around on the beach.

Hoping to work in some more in the future

Yep. You use super science to save the world, someone is gonna hire someone else to use super science to stop you.

For what it's worth, you basically nailed the next part of her explanation.